After the success of the companys first two months, Santana Rey continues to operate Business Solutions. The November 30, 2019, unadjusted trial balance of Business Solutions (reflecting its transactions for October and November of 2019) follows.

No.	Account Title	Debit			Credit
101	Cash	$	38,464
106	Accounts receivable		13,118
126	Computer supplies		2,545
128	Prepaid insurance		2,040
131	Prepaid rent		3,040
163	Office equipment		8,000
164	Accumulated depreciationOffice equipment				$	0
167	Computer equipment		21,600
168	Accumulated depreciationComputer equipment					0
201	Accounts payable					0
210	Wages payable					0
236	Unearned computer services revenue					0
307	Common stock					63,000
318	Retained earnings					0
319	Dividends		6,300
403	Computer services revenue					37,844
612	Depreciation expenseOffice equipment		0
613	Depreciation expenseComputer equipment		0
623	Wages expense		2,500
637	Insurance expense		0
640	Rent expense		0
652	Computer supplies expense		0
655	Advertising expense		1,708
676	Mileage expense		604
677	Miscellaneous expenses		200
684	Repairs expenseComputer		725
	Totals	$	100,844		$	100,844

Business Solutions had the following transactions and events in December 2019.

Dec.	2		Paid $950 cash to Hillside Mall for Business Solutions share of mall advertising costs.
	3		Paid $490 cash for minor repairs to the companys computer.
	4		Received $4,050 cash from Alexs Engineering Co. for the receivable from November.
	10		Paid cash to Lyn Addie for six days of work at the rate of $100 per day.
	14		Notified by Alexs Engineering Co. that Business Solutions bid of $7,800 on a proposed project has been accepted. Alexs paid a $2,400 cash advance to Business Solutions.
	15		Purchased $2,000 of computer supplies on credit from Harris Office Products.
	16		Sent a reminder to Gomez Co. to pay the fee for services recorded on November 8.
	20		Completed a project for Liu Corporation and received $6,575 cash.
	2226		Took the week off for the holidays.
	28		Received $3,200 cash from Gomez Co. on its receivable.
	29		Reimbursed S. Rey for business automobile mileage (600 miles at $0.31 per mile).
	31		The company paid $1,200 cash in dividends.

The following additional facts are collected for use in making adjusting entries prior to preparing financial statements for the companys first three months.

1. The December 31 inventory count of computer supplies shows $590 still available.
2. Three months have expired since the 12-month insurance premium was paid in advance.
3. As of December 31, Lyn Addie has not been paid for four days of work at $100 per day.
4. The computer system, acquired on October 1, is expected to have a four-year life with no salvage value.
5. The office equipment, acquired on October 1, is expected to have a five-year life with no salvage value.
6. Three of the four months' prepaid rent have expired.

Required: 1.Prepare a statement of retained earnings for the three months ended December 31, 2019. 2. Prepare a balance sheet as of December 31, 2019. 3.Record the necessary closing entries as of December 31, 2019 and then post the closing entries to the general ledger in Requirement 2B. 4. Prepare a post-closing trial balance as of December 31, 2019.